Re: TTL output from an 800XL?

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Article #387

#387

From: T Burger
Date: Thu, 28 Aug 1986 13:21

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> Is there any way to get TTL video output from an 800XL without building
> some sort of RF-to-TTL or composite-to-TTL converter?

If you mean RGB TTL the answer is; You have to build something.

If you mean a TTL version of the luminance signal then it is available
	inside the 800XL.

	The GTIA chip (U17) has 4 bits of luma on pins

		31   bit 0
		22   bit 1
		23   bit 2
		24   bit 3

		25   sync

	these are buffered by a 4050 (U20)

		6  bit 0
		12 bit 1
		4  bit 2
		2  bit 3
		15 sync


Hope this helps.

Ted Burger

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Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!columbia!caip!clyde!cbatt!cbosgd!ihnp4!inuxc!inuxm!tob
From: tob@inuxm.UUCP (T Burger)
Newsgroups: net.micro.atari8
Subject: Re: TTL output from an 800XL?
Message-ID: <420@inuxm.UUCP>
Date: Thu, 28-Aug-86 09:21:05 EDT
Article-I.D.: inuxm.420
Posted: Thu Aug 28 09:21:05 1986
Date-Received: Sat, 30-Aug-86 03:18:43 EDT
References: <8608261645.AA01484@ucbvax.Berkeley.EDU>
Organization: AT&T Consumer Products, Indianapolis
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